Dependence of ΔE effect on internal stresses in nickel:: Experimental results by laser interferometry

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:297

Article

Chicharro, JM ; Bayón, A ; Salazar, F

关键词: Young's modulus;    resonance;    interferometry;    speckle;    internal stress;    nickel;   

DOI  :  10.1016/j.jmmm.2005.02.048

来源: Elsevier

【 摘 要 】

The speckle heterodyne interferometry is applied to the study of the dependence of Young's modulus on both the magnetic field and the internal stresses in a soft ferromagnetic material. Young's modulus is determined from the first natural longitudinal frequency of a slender magnetic rod positioned within a solenoid. Vibration of the sample is detected by an optical heterodyne system with a wide bandwidth. The samples are heated to above the Curie point and then cooled at several rates in order to induce different internal stresses. The study refers to nickel rods 10 min in diameter and 110 min in length. The grain sizes of the samples are also determined and related to changes in Delta E. (C) 2005 Elsevier B.V. All rights reserved.

【 授权许可】

Free